In the 1970s, a truth was accidentally discovered about depression – one that was quickly swept aside, because its implications were too inconvenient, and too explosive. American psychiatrists had produced a book that would lay out, in detail, all the symptoms of different mental illnesses, so they could be identified and treated in the same way across the United States. It was called the Diagnostic and Statistical Manual. In the latest edition, they laid out nine symptoms that a patient has to show to be diagnosed with depression – like, for example, decreased interest in pleasure or persistent low mood. For a doctor to conclude you were depressed, you had to show five of these symptoms over several weeks. more...